Number column uses text sort

I just started using the new version (1.3.4) and found that the Number column sorts as text, not in numerical order. [1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9] instead of [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12].